Although Hugh Allan did not imitate his father's conduct towards ecclesiastics, he felt bound by all-ruling custom to avenge his father's death. In all ancient countries the kinsmen of a murdered man were both by law and custom the avengers of his blood. The members of the Greek _phratry_, of the Roman _fatria_, or _gens_, of the Germanic and Anglo-Saxon _guild_, and of the mediaeval sworn _commune_, were all solemnly bound to avenge the blood of any of their brethren, unlawfully slain. So that the repulsive repetition of reprisals, which so disgusts the modern reader in our old annals, is by no means a phenomenon peculiar to the Irish state of society. It was in the middle age and in early times common to all Europe, to Britain and Germany, as well as to Greece and Rome. It was, doubtless, under a sense of duty of this sort that Hugh V. led into Leinster a large army (A.D. 733), and the day of Ath-Senaid fully atoned for the day of Almain. Nine thousand of the men of Leinster were left on the field, including most of their chiefs; the victorious monarch losing a son, and other near kinsmen. Four years later, he himself fell in an obscure contest near Kells, in the plain of Meath. Some of his quartrains have come down to us, and they breathe a spirit at once religious and heroic—such as must have greatly endeared the Prince who possessed it to his companions in arms. We are not surprised, therefore, to find his reign a favourite epoch with subsequent Bards and Storytellers. The long and prosperous reign of Donald III. succeeded (A.D. 739 to 759). He is almost the only one of this series of Kings of whom it can be said that he commanded in no notable battle. The annals of his reign are chiefly filled with ordinary accidents, and the obits of the learned. But its literary and religious record abounds with bright names and great achievements, as we shall find when we come to consider the educational and missionary fruits of Christianity in the eighth century. While on a pilgrimage to Durrow, a famous Columbian foundation in Meath, and present King's County, Donald III. departed this life, and in Durrow, by his own desire, his body was interred.